Dukes County
Also known as Dukes County, Massachusetts, Dukes County, MA
county in Massachusetts, United States
Key facts
- Country
- United States
- State
- Massachusetts
- Named after
- James, Duke of York
- Seat
- Edgartown
- Largest town
- Oak Bluffs
- Total
- 491 sq mi (1,270 km )
- Land
- 103 sq mi (270 km )
- Water
- 388 sq mi (1,000 km ) 79%
- Estimate 2025
- 21,219
- Density
- 199.6/sq mi (77.1/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
- Congressional district
~10 min read
Article
Dukes County is a county in the U.S. state of Massachusetts. At the 2020 census, the population was 20,600, making it the second-least populous county in Massachusetts. Its county seat is Edgartown.
Dukes County comprises the Vineyard Haven, MA Micropolitan Statistical Area. The county consists of 33 named islands, the largest of which is Martha's Vineyard. It also includes Chappaquiddick Island (sometimes peninsula of the Vineyard), the Elizabeth Islands, including Cuttyhunk, and Nomans Land.
Gallery (4)
On the map
2 mapped locations